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Primary smelting with multipolar cell


Technology Description

While conventional Hall-Héroult cells used for aluminium electrolysis have a single-pole arrangement, multipolar cells could be produced by using bipolar electrodes or having multiple anode-cathode pairs in the same cell. They have lower operating temperatures and higher current densities, potentially reducing energy consumption by 40%. Their formulate requires pairing with inert anodes.

Relevance for Net Zero

The technology can help reduce electricity needs, thus helping reduce pressure on the power system. However, it requires inert anodes to function, and its impact on emissions would be in terms of indirect electricity emissions (which should be decarbonising in parallel).

Key Countries

United States

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